- published: 10 Jul 2016
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Interstate 94 (I-94) is the northernmost east–west Interstate Highway connecting the Great Lakes and Intermountain regions of the United States. I-94's western terminus is in Billings, Montana, at a junction with I-90; its eastern terminus is the U.S. side of the Blue Water Bridge in Port Huron, Michigan, at the Sarnia, Ontario, Canada, border, where together with I-69 it meets Highway 402. Given this fact, I-94 is notable for being the only east–west Interstate Highway to form a direct connection into Canada connecting points from Seattle via I-90 to Toronto via Ontario Highway 401.
Lengthwise, I-94 is the eighth longest Interstate highway and is longer than all major north–south interstate highways except I-75 and I-95, meaning that I-94 is longer than I-5, I-15, I-25, I-35, I-45, I-55, I-65, and I-85.
I-94 crosses I-90 several times: at its western terminus; near Madison, Wisconsin; in Chicago, and in Lake Station, Indiana.
I-94 begins at Billings and travels northeastward toward Glendive before exiting the state to the east. I-94 links seven counties, which are Yellowstone, Treasure, Rosebud, Custer, Prairie, Dawson, and Wibaux counties and passes near or through Miles City, and Glendive while connecting with I-90 in Billings. The Highway is notable for following the Yellowstone River from Billings through Glendive. Beyond the western terminus of I-94, I-90 connects Westbound I-94 travelers to points west such as Butte and Seattle, WA.